JP2022036839A - Image processing apparatus, image processing method, and image processing program - Google Patents

Abstract

To increase the efficiency of color gamut checking work.SOLUTION: An image processing apparatus has: a display control unit that displays, on a display, an image indicating a diagram representing a color gamut, dots representing specified colors, and one or more axes representing the feature quantity of colors in a state seen from a predetermined viewpoint in the same three-dimensional color space; and a receiving unit that receives an instruction from a user. The display control unit changes the image based on the instruction and in association with a change of the viewpoint.SELECTED DRAWING: Figure 4

Description

The present invention relates to an image processing apparatus, an image processing method and an image processing program.

For color matching between devices that handle colors, an ICC (International Color Consortium) profile that associates a coordinate value in a device-dependent CMYK color space or the like with a coordinate value in a device-independent CIELAB color space or the like is generally used.

In industries such as the printing industry, it is desirable to output the specified color as accurately as possible, so whether or not the specified color is within the color gamut of the ICC profile, or the specified color is the color of the ICC profile. If it is not in the gamut, there is a desire to know how far it is out.

Patent Document 1 discloses a technique for displaying the shapes of the color gamuts of an input device and an output device in the same color space.

Japanese Unexamined Patent Publication No. 2010-21329

However, in the technique described in Patent Document 1, since the viewpoint of the displayed color gamut is fixed, it is difficult to know the relationship between the color gamuts of the input device and the output device over the entire range. Therefore, the technique described in Patent Document 1 has a problem that it is difficult to determine the relationship with the color gamut of the ICC profile depending on the designated color.

One aspect of the image processing apparatus of the present invention is to form a figure representing a color gamut, a dot representing a designated color, and one or more axes representing a color feature amount from a predetermined viewpoint in the same three-dimensional color space. It has a display control unit that displays an image shown in a viewed state on a display device, and a reception unit that receives an instruction from a user. Change the image.

One aspect of the image processing method of the present invention is to form a figure representing a color gamut, a dot representing a designated color, and one or more axes representing a color feature amount from a predetermined viewpoint in the same three-dimensional color space. It includes displaying an image to be shown in a viewed state on a display device, accepting an instruction from a user, and changing the image according to a change in the viewpoint based on the instruction.

One aspect of the image processing program of the present invention is to create a figure representing a color gamut, a dot representing a designated color, and one or more axes representing a color feature amount from a predetermined viewpoint in the same three-dimensional color space. A computer is made to display an image to be shown in a viewed state on a display device, to accept an instruction from a user, and to change the image according to a change in the viewpoint based on the instruction.

It is a schematic diagram which shows the structural example of the system which uses the image processing apparatus which concerns on embodiment. It is a flowchart which shows the image processing method which concerns on embodiment. It is a figure for demonstrating an example of an ICC profile. It is a figure which shows an example of the image displayed on the display device using an image processing device. It is a schematic diagram for demonstrating the comparison between a color gamut and a designated color. It is a figure which shows an example of the image which displayed the color gamut by a surface model. It is a figure which shows an example of the image when the color gamut is hidden.

Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings. In the drawings, the dimensions or scale of each part are appropriately different from the actual ones, and some parts are schematically shown for easy understanding. Further, the scope of the present invention is not limited to these forms unless it is stated in the following description that the present invention is particularly limited.

1. 1. Embodiment 1-1. Outline of System 100 Using Image Processing Device 1 FIG. 1 is a schematic view showing a configuration example of a system 100 using image processing device 1 according to an embodiment. The system 100 is a system that displays the relationship between the color gamut of the ICC profile D1 and the color indicated by the designated color information D2.

The system 100 includes an image processing device 1, a display device 200, a printing device 300, and an input device 400. The image processing device 1 is communicably connected to each of the display device 200, the printing device 300, and the input device 400. The printing device 300 may be omitted.

The display device 200 is a device that displays under the control of the image processing device 1. For example, the display device 200 is a display device including various display panels such as a liquid crystal display panel or an organic EL (electro-luminescence) display panel. The display device 200 may be separate or integrated with the image processing device 1.

The printing device 300 is a device that prints on a printing medium under the control of the image processing device 1. The print medium is not particularly limited, and is, for example, various papers, various cloths, various films, and the like. In the example shown in FIG. 1, the printing apparatus 300 is an inkjet printer having an ink jet head 310 that jets inks of four colors of cyan, magenta, yellow, and black. Although not shown, the printing device 300 repeatedly conveys the ink injection head 310, a transfer mechanism that conveys the print medium in a predetermined direction, and the ink injection head 310 along an axis orthogonal to the transfer direction of the print medium. It has a moving mechanism to move it to.

The input device 400 is a device that accepts operations from the user. For example, the input device 400 includes a pointing device such as a touch pad, a touch panel, or a mouse. Here, when the input device 400 includes a touch panel, the input device 400 may also serve as a display device 200.

The ink injection head 310 includes a C injection unit 311C that injects cyan ink, an M injection unit 311M that injects magenta ink, a Y injection unit 311Y that injects yellow ink, and K injection that injects black ink. It has a portion 311K and. Under the control of the processing device 10, each of these injection units ejects ink supplied from an ink container (not shown) onto a printing medium from a plurality of nozzles (not shown). More specifically, each injection unit has a pressure chamber and a driving element (not shown) for each nozzle, and the ink in the pressure chamber is ejected from the nozzle by varying the pressure in the pressure chamber by the driving element. The driving element is, for example, a piezoelectric element or a heat generating element. In the above printing apparatus 300, the reciprocating movement of the ink injection head 310 and the injection of ink are performed in parallel to form an image on the print surface of the print medium.

The moving mechanism for reciprocating the ink injection head 310 may be omitted. In this case, for example, the ink injection head 310 may be provided over the entire width direction orthogonal to the transport direction of the print medium. Further, the number of ink colors ejected by the ink injection head 310 is not limited to the above-mentioned four colors, and may be three or less colors or five or more colors.

The image processing device 1 is a computer that causes the display device 200 to display an image based on the ICC profile D1 and the designated color information D2. The image processing device 1 of the present embodiment has a printing function for printing the printing device 300 using the ICC profile D1 in addition to a display function for displaying the image. The printing function may be omitted. Hereinafter, the configuration of the image processing apparatus 1 will be described.

1-2. Configuration of Image Processing Device 1 As shown in FIG. 1, the image processing device 1 includes a processing device 10, a storage device 20, and a communication device 40. These are communicably connected to each other.

The processing device 10 is a device having a function of controlling each part of the image processing device 1 and a function of processing various data. The processing device 10 includes, for example, a processor such as a CPU (Central Processing Unit). The processing device 10 may be configured by a single processor or may be configured by a plurality of processors. In addition, some or all of the functions of the processing device 10 are realized by hardware such as DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), FPGA (Field Programmable Gate Array). You may.

The storage device 20 is a device that stores various programs executed by the processing device 10 and various data processed by the processing device 10. The storage device 20 includes, for example, a hard disk drive or a semiconductor memory. A part or all of the storage device 20 may be provided in a storage device or a server outside the image processing device 1.

The storage device 20 of the present embodiment stores the image processing program PG, the ICC profile D1, the designated color information D2, and the setting information D3. The image processing program PG is a program that causes the image processing apparatus 1 to execute the image processing method described later. The ICC profile D1 will be described in detail later. The designated color information D2 is information regarding a color value represented by a coordinate value in a device-dependent color space such as an RGB color space or a CMYK color space. The setting information D3 is information related to the setting of display elements such as the background color or font of the image based on the ICC profile D1 and the designated color information D2. The ICC profile D1, the designated color information D2, and the setting information D3 are input to the image processing device 1 by the user's operation based on the instruction by the reception unit 12 described later. However, a part or all of the setting information D3 is set in advance and is appropriately changed based on the instruction by the reception unit 12.

The communication device 40 is an interface that is communicably connected to an external device such as a display device 200, a printing device 300, and an input device 400. For example, the communication device 40 includes interfaces such as USB (Universal Serial Bus) and LAN (Local Area Network). The communication device 40 may be wirelessly connected to the external device by, for example, Wi-Fi or Bluetooth, or may be connected to the external device via a LAN (Local Area Network), the Internet, or the like. HDMI, Wi-Fi and Bluetooth are registered trademarks, respectively.

In the image processing device 1 having the above configuration, the processing device 10 reads the image processing program PG from the storage device 20 and executes it. By this execution, the processing apparatus 10 functions as a display control unit 11, a reception unit 12, and a conversion unit 13.

The display control unit 11 controls the drive of the display device 200. Specifically, the display control unit 11 causes the display device 200 to display an image based on the ICC profile D1 and the designated color information D2. The image is, for example, an image G described later, and has the same three dimensions of a figure representing the color gamut of the ICC profile D1, dots indicated by the designated color information D2, and one or more axes representing a color feature amount. Shows the state seen from a predetermined viewpoint in the color space of. Further, the display control unit 11 changes the image based on the instruction from the reception unit 12. The "color feature amount" is an amount representing a color feature, and is, for example, hue, lightness, saturation, or the like.

The reception unit 12 receives instructions from the user. Specifically, the reception unit 12 receives an instruction from the user via the input device 400. The instruction is given using an image GU for a GUI (Graphical User Interface) including the image G described later. Further, the reception unit 12 appropriately changes the setting information D3 based on the instruction. The specific content of the instruction will be described in detail later.

The conversion unit 13 converts information such as the designated color information D2 using the ICC profile D1. Specifically, the conversion unit 13 uses the ICC profile D1 to move from a device-dependent color space such as an RGB color space or a CMYK color space to a device-independent color space such as an L ^* a ^* b ^* color space or an XYZ color space. Performs coordinate value conversion of. Here, the conversion unit 13 is input with a coordinate value group indicating the outline of the color gamut of the ICC profile D1 in the device-dependent color space, or is input with the designated color information D2.

When a coordinate value group indicating the outline of the color gamut of the ICC profile D1 is input in the device-dependent color space, the conversion unit 13 converts the outline of the color gamut of the ICC profile D1 in the device independent color space by the coordinate value conversion. Generate the indicated coordinate value group. Using this coordinate value group, the display control unit 11 causes the display device 200 to display a figure representing the color gamut in the device independent space.

When the designated color information D2 is input, the conversion unit 13 generates the coordinate values indicated by the designated color information D2 in the device independent color space by the coordinate value conversion. Using this coordinate value, the display control unit 11 causes the display device 200 to display a dot representing a designated color in the device independent space.

1-3. Operation of Image Processing Device 1 FIG. 2 is a flowchart showing an image processing method according to an embodiment. The image processing method is performed using the image processing device 1. First, the image processing device 1 accepts the input of the ICC profile D1 in step S1. This input is performed using the image GU described later.

Then, in step S2, the image processing apparatus 1 converts the color gamut of the ICC profile D1 into coordinate values. This coordinate value conversion is performed by the conversion unit 13 as described above.

Next, the image processing apparatus 1 accepts the input of the designated color information D2 in step S3. This input is performed using the image GU described later. In addition, this step may be performed before step S2.

Then, in step S4, the image processing apparatus 1 converts the designated color indicated by the designated color information D2 into coordinate values. This coordinate value conversion is performed by the conversion unit 13 as described above. It should be noted that this step may be performed after step S3, and when step S3 is performed before step S2, it may be performed before step S2.

Next, in step S5, the image processing apparatus 1 generates image information by using the information obtained in steps S2 and S4 and the setting information D3. This generation is performed by the display control unit 11.

Then, in step S6, the image processing device 1 causes the display device 200 to display an image based on the image information obtained in step S5. This display is performed under the control of the display control unit 11.

After that, the image processing device 1 determines in step S7 whether or not there is an instruction from the reception unit 12. This determination is made by the display control unit 11.

When instructed by the reception unit 12, the image processing device 1 returns to step S5 described above. As a result, the image changed based on the instruction is displayed on the display device 200 again in step S6.

On the other hand, if there is no instruction from the reception unit 12, the image processing apparatus 1 determines in step S8 whether or not there is an end instruction, and if there is no end instruction, the image processing apparatus 1 returns to the above-mentioned step S7, while ending. If there is an instruction of, the process ends.

In the above image processing method, in step S6, a figure representing a color gamut, a dot representing a designated color, and one or more axes representing a color feature amount are formed from a predetermined viewpoint in the same three-dimensional color space. The image shown in the viewed state is displayed on the display device 200. Further, step S7 receives an instruction from the user. Further, step S6 after step S7 changes the image according to the change of the viewpoint based on the instruction. Hereinafter, the ICC profile D1 and the image will be described in detail.

FIG. 3 is a diagram for explaining an example of ICC profile D1. The ICC profile D1 contains information TBL1 and TBL2, for example, as shown in FIG.

Information TBL1 and TBL2 are information regarding the correspondence between the coordinate values of the color space CS1 and the coordinate values of the color space CS2, respectively. However, the information TBL1 is an A2B table that converts the coordinate values of the color space CS1 (C _i , M _i , Y _i , K _i ) into the coordinate values of the color space CS 2 (L _i , a _i , bi ₎ . The variable i is a variable that identifies the grid point GD1 set in the color space CS1. The grid points GD1 are usually arranged at equal intervals in the direction along each axis of the color space CS1. On the other hand, the information TBL2 is a B2A table that converts the coordinate values of the color space CS2 (L _j , a _j , b _j ) into the coordinate values of the color space CS1 (C _j , M _j , Y _j , K _j ). The variable j is a variable that identifies the grid point GD2 set in the color space CS2. The grid points GD2 are usually arranged at equal intervals in the direction along each axis of the color space CS2.

The color space CS1 is, for example, a device-dependent color space that depends on the device. FIG. 2 illustrates a case where the color space CS1 is a CMYK color space. On the other hand, the color space CS2 is a so-called profile connection space (PCS), and is, for example, a device-independent color space that does not depend on the device. In FIG. 2, a case where the color space CS2 is an L ^* a ^* b ^* color space is illustrated. The color space CS1 may be any color space that can be used by the output device, and is not limited to the CMYK color space, and may be, for example, a CMY color space or a color space unique to the output device. Further, the color space CS2 may be any color space that does not depend on the device, and is not limited to the L ^* a ^* b ^* color space, and may be, for example, an XYZ color space or the like.

The above-mentioned coordinate values (C _j , M _j , Y _j , K _j ) correspond to, for example, the ink color of the above-mentioned ink injection head 310, and are values corresponding to the amount of ink used for each color.

FIG. 4 is a diagram showing an example of an image G displayed on the display device 200 using the image processing device 1. By executing the image processing program PG, the image processing device 1 causes the display device 200 to display the image GU for the GUI including the image G as an application window, for example, as shown in FIG. This display is performed by the display control unit 11 described above.

The image G shows the graphic FG, the dots DT_1 to DT_3, and the axes AX_1 to AX_3 in the same color space CS as viewed from a predetermined viewpoint. In the example shown in FIG. 4, the color space CS is the L ^* a ^* b ^* color space.

The figure FG is a figure showing the shape of the color space CS2 in the above-mentioned information TBL1, and represents the color gamut of the ICC profile D1. In the example shown in FIG. 4, the graphic FG is displayed in a wireframe model.

Each of the dots DT_1 to DT_1 represents the designated color indicated by the designated color information D2. In the example shown in FIG. 4, the dot DT_2 is highlighted by being displayed larger than the dot DT_1 and the dot DT_3. In the following, each of the dots DT_1 to DT_1 may be referred to as a dot DT. In the example shown in FIG. 4, the number of dot DTs is 3, but it may be 2 or less or 4 or more. Further, the highlighting method is not limited to the example shown in FIG. 4, and for example, the color or shape may be changed.

Each of the axes AX_1 to AX_1 represents a color feature amount. Specifically, the axis AX_1 is an example of the “first axis” and represents a hue. The axis AX_1 is an example of the “second axis” and represents a hue different from that of the axis AX_1. Axis AX_3 represents lightness. As described above, since the color space CS is the L ^* a ^* b ^* color space, the axes AX_1 to AX_3 are the L ^* axis, the a ^* axis, and the b ^* axis. For example, axis AX_1 is the a ^* axis showing the color change between green and red, axis AX_1 is the b ^* axis showing the color change between blue and yellow, and axis AX_1 is white and black. It is the L ^* axis showing the change in color between. In the following, each of the axes AX_1 to AX_3 may be referred to as an axis AX.

Here, in FIG. 4, although not shown for convenience of drawing, each axis AX is displayed so as to represent a color feature amount. For example, the axis AX_1 is displayed in a color corresponding to the hue of the a ^* axis. The axis AX_2 is displayed in a color corresponding to the hue of the b ^* axis. The axis AX may represent a color feature amount by adding a scale or the like.

Further, in addition to the image G, the image GU includes buttons BT1 to BT11 and display columns DS1 to DS3 as displays related to the image G. Here, by each operation for the buttons BT3 to BT10, the instruction in step S7 shown in FIG. 2 described above is received by the reception unit 12.

The button BT1 is a button for inputting the ICC profile D1 which is a candidate for display. For example, by operating this button, a window for selecting a file of ICC profile D1 is displayed. One or more ICC profiles D1 added by operating the button BT1 are displayed in the display field DS1. The display field DS1 shown in FIG. 4 has a check box for selecting whether or not to display the ICC profile D1. The information of the ICC profile D1 selected by the check box is displayed in the display field DS2. Further, by selecting the check box, step S1 shown in FIG. 2 described above is performed.

The button BT2 is a button for closing the application window by the image GU. By operating this button, the end instruction in step S8 shown in FIG. 2 described above is given.

The button BT3 is a button for moving the figure FG in the image G. For example, if a drag operation is performed with the mouse after selecting this button, the figure FG moves in the operation direction.

The button BT4 is a button for rotating the figure FG in the image G. For example, when a drag operation is performed with the mouse after selecting this button, the graphic FG rotates around an axis orthogonal to the operation direction. Here, as the figure FG rotates, the color space CS, the dot DT, and the axis AX also rotate.

The button BT5 is a button for reducing the figure FG in the image G. For example, each time this button is operated, the figure FG is reduced.

The button BT6 is a button for enlarging the graphic FG in the image G. For example, each time this button is operated, the figure FG is enlarged.

The button BT7 is a button for setting the axis AX. For example, by operating this button, a window for setting whether or not to display the axis AX, the color of the axis AX, and the like is displayed.

The button BT8 is a button for setting the background color of the image G. For example, by operating this button, a color palette for setting the background color of the image G is displayed. In the example shown in FIG. 4, black is set as the background color of the image G. Further, in the example shown in FIG. 4, a grid of the color space CS is displayed on the background of the image G.

The button BT9 is a button for setting the display of the graphic FG. Specifically, the button BT9 has a check box for selecting whether or not to display in the surface model, and a check box for selecting whether or not to display in the wire frame model. In the example shown in FIG. 4, it is selected to display the graphic FG in the wireframe model.

The button BT10 is a button for setting the color of the graphic FG when displayed in the surface model. Specifically, the button BT10 is a radio button for selecting whether to display in a gradation according to a color value or in a single color. In the example shown in FIG. 4, it is selected to display the graphic FG with a gradation. However, since it is selected to display the graphic FG in the wire frame model as described above, the function by the button BT10 is not exhibited.

The button BT11 is a button for inputting the designated color information D2. For example, by operating this button, a window for selecting a file of the designated color information D2 is displayed. In the file, for example, a plurality of designated colors can be collectively input using a file format such as CSV format. The designated color of the designated color information D2 added by the operation of the button BT11 is displayed in the display field DS3. The display field DS3 shown in FIG. 4 has a check box for selecting whether or not to display the target for each designated color. The designated color selected by the check box is displayed as a dot DT in the image G. Further, in the display field DS3, a designated color can be selected. The dot DT corresponding to the selected designated color is highlighted as compared to other dot DTs.

FIG. 5 is a schematic diagram for explaining a comparison between a color gamut and a designated color. In FIG. 5, two images G having different 90 ° viewpoints around the axis AX_3 are exemplified. From the viewpoint where the dot DT overlaps the figure FG as in the image G shown on the left side in FIG. 5, it is difficult to know whether or not the designated color represented by the dot DT is in the color gamut represented by the figure FG. Further, even if it is found that the designated color represented by the dot DT is not included in the color gamut represented by the figure FG, the degree of deviation of the designated color with respect to the color gamut is unknown.

On the other hand, by changing the viewpoint using the button BT4 described above, the designated color represented by the dot DT is a graphic at the viewpoint where the dot DT does not overlap the graphic FG as in the image G shown on the right side in FIG. It can be seen that it is not in the color gamut represented by FG. In addition, by observing the axis AX together, it is easy to understand how much the designated color deviates from the color gamut.

FIG. 6 is a diagram showing an example of an image G in which the color gamut is displayed by a surface model. FIG. 6 illustrates a graphic FG displayed in a surface model using the button BT9 described above. In the example shown in FIG. 6, the graphic FG is displayed with a gradation corresponding to the color value in the outer outline of the color gamut by using the button BT10. In the example shown in FIG. 6, since the designated color information D2 is not input, the dot DT is also not displayed.

FIG. 7 is a diagram showing an example of the image G when the color gamut is hidden. FIG. 7 illustrates a case where the graphic FG is hidden by using the button BT9 described above. In the example shown in FIG. 7, since the designated color information D2 is not input, the dot DT is not displayed either.

As described above, the above image processing device 1 has a display control unit 11 and a reception unit 12. The display control unit 11 causes the display device 200 to display the image G. The image G is a state in which a graphic FG representing a color gamut, a dot DT representing a designated color, and one or more axes AX representing a color feature amount are viewed from a predetermined viewpoint in the same three-dimensional color space CS. show. The reception unit 12 receives instructions from the user. Then, the display control unit 11 changes the image G according to the change of the viewpoint indicated by the image G based on the instruction by the reception unit 12.

In the above image processing device 1, since the graphic FG and the dot DT are shown in the same color space CS on the image G displayed on the display device 200, the designated color enters the color gamut by observing the graphic FG and the dot DT. It is possible for the user to judge whether or not it is. Moreover, since one or more axis AX is shown in the same color space CS in addition to the graphic FG and the dot DT in the image G displayed on the display device 200, the designated color can be obtained by observing the axis AX together. If it is not in the color gamut, the user can also judge how much the specified color deviates from the color gamut. Further, since the image G changes with the change of the viewpoint based on the instruction from the user, the positional relationship between the graphic FG and the dot DT shown in the image G can be changed so as to be easy to see. It is possible to simplify and speed up the judgment.

As described above, one or more axis AX includes an axis AX_1 which is an example of the “first axis” and an axis AX_1 which is an example of the “second axis”. Axis AX_3, which is an example of the "third axis", is included. Each of the axis AX_1 and the axis AX_1 is an axis representing a hue. However, the axis AX_1 and the axis AX_1 represent different hues from each other. Axis AX_3 is an axis representing lightness.

In the present embodiment, as described above, it is preferable that the image G shows the axis AX_1 in the color corresponding to the hue represented by the axis AX_1 and the axis AX_1 in the color corresponding to the hue represented by the axis AX_1.

In this way, by using the axes AX_1 and the axes AX_1 that represent hues, it is possible for the user to determine how much the hue of the specified color deviates from the color gamut when the specified color is not in the color gamut. be. In particular, since each of the axis AX_1 and the axis AX_1 is indicated by a color corresponding to the hue indicated by each axis, there is an advantage that the degree of the hue shift of the designated color with respect to the color gamut is visually easy to understand.

Further, as described above, the image processing device 1 further includes a conversion unit 13. The conversion unit 13 uses the ICC profile D1 having the target color gamut to convert the designated color information D2 regarding the designated color from the coordinate values in the RGB color space or the CMYK color space to the coordinate values in the L ^* a ^* b ^* color space. Convert. The display control unit 11 causes the display device 200 to display the image G using the information after conversion by the conversion unit 13. Therefore, it is possible to determine whether or not the designated color indicated by the designated color information D2 is in the color gamut of the ICC profile D1.

As described above, the display control unit 11 changes the background color of the image G based on the instruction from the reception unit 12. Therefore, the figure FG, the dot DT, and the axis AX can be easily seen, and as a result, the comparison between them becomes easy. For example, when the axis AX_1 or the axis AX_1 representing the hue is indicated by a color corresponding to the hue indicated by the axis, the hue deviation can be determined by making the hue and the background color different from each other regarding the deviation of the specified color with respect to the color gamut. It will be easy.

Further, as described above, the display control unit 11 switches whether or not to display the graphic FG in the wire frame model based on the instruction from the reception unit 12. When the graphic FG is displayed in the wire frame model, the dot DT is prevented from being hidden behind the graphic FG, so that there is an advantage that the relationship between the graphic FG and the dot DT can be easily grasped. Further, by switching whether or not the graphic FG is displayed in the wire frame model, the visibility of the graphic FG and the dot DT can be changed according to the user's intention.

Further, as described above, the display control unit 11 switches whether or not to display the graphic FG on the surface model based on the instruction from the reception unit 12. When the figure FG is displayed in the surface model, the dot DT located outside the figure FG is easy to see. Further, when the graphic FG is colored according to the color of the color gamut, there is an advantage that the characteristics of the color gamut are easy to understand. Further, by switching whether or not the graphic FG is displayed on the surface model, the visibility of the graphic FG and the dot DT can be changed according to the user's intention.

Further, as described above, the display control unit 11 changes the color of the figure FG based on the instruction from the reception unit 12. Therefore, for example, by applying a color scheme to the graphic FG according to the color of the color gamut, it is possible to make it easier to visually understand the characteristics of the color gamut.

Further, as described above, the display control unit 11 highlights the dot DT selected by the user based on the instruction by the reception unit 12 as compared with the case where the dot DT is not selected. Therefore, the dot DT to be compared with the graphic FG can be visually easily understood. In particular, when the dot DT includes a plurality of dots DT_1, DT_2, and DT_3 as in the present embodiment, it is easy to understand which dot is the comparison target with the graphic figure FG.

Further, as described above, the display control unit 11 enlarges or reduces the graphic FG based on the instruction from the reception unit 12. Therefore, the comparison between the graphic FG and the dot DT becomes easy. For example, by enlarging the figure FG, the deviation of the dot DT with respect to the figure FG can be known in detail. Further, for example, by reducing the figure FG, it is possible to make it easier to find the dot DT in the image G.

Further, as described above, the color space CS is an L ^* a ^* b ^* color space. The L ^* a ^* b ^* color space is designed to approximate human vision. Therefore, by using the L ^* a ^* b ^* color space as the color space CS, it becomes easier for the user to compare the color gamut and the designated color as compared with the case of using another color space.

2. 2. Modification example Each form in the above examples can be variously transformed. Specific embodiments that can be applied to each of the above-mentioned embodiments are illustrated below. It should be noted that the two or more embodiments arbitrarily selected from the following examples can be appropriately merged within a range that does not contradict each other.

In the above-described form, the configuration in which the color space CS indicated by the image G is the L ^* a ^* b ^* color space is exemplified, but the color space CS is not limited to the L ^* a ^* b ^* color space, for example. It may be an XYZ color space or the like.

Further, the color feature amount represented by the axis AX is appropriately changed according to the type of the color space CS. That is, the color feature amount represented by the axis AX is not limited to hue and lightness, and may be, for example, saturation or tristimulation value.

The number of axes AX shown in the image G is not limited to three, and may be two or less, or four or more.

Further, in the above-described embodiment, a configuration in which the image processing program PG is installed in a computer such as a personal computer is exemplified, but the configuration is not limited to the configuration. For example, the image processing program PG may be installed in an output device such as a printer, a tablet terminal, or a portable device such as a smartphone.

1 ... Image processing device, 11 ... Display control unit, 12 ... Reception unit, 13 ... Conversion unit, 200 ... Display device, 300 ... Printing device, AX ... Axis, AX_1 ... Axis, AX_2 ... Axis, AX_3 ... Axis, CS ... Color space, D1 ... ICC profile, DT ... dot, DT_1 ... dot, DT_2 ... dot, DT_3 ... dot, FG ... graphic, G ... image, PG ... image processing program

Claims (14)

A display device displays an image showing a figure representing a color gamut, a dot representing a specified color, and one or more axes representing a feature amount of a color in the same three-dimensional color space as viewed from a predetermined viewpoint. Display control unit and
It has a reception section that accepts instructions from users,
The display control unit changes the image according to the change of the viewpoint based on the instruction.
Image processing device. The one or more axes include an axis representing lightness.
The image processing apparatus according to claim 1. The one or more axes include axes representing hues.
The image shows the axis in a color corresponding to the hue represented by the axis.
The image processing apparatus according to claim 1 or 2. The one or more axes include a first axis, a second axis, and a third axis.
The first axis is an axis representing hue, and is
The second axis is an axis representing a hue different from that of the first axis.
The third axis is an axis representing brightness, and is
The image is
The first axis is indicated by a color corresponding to the hue represented by the first axis.
The second axis is indicated by a color corresponding to the hue represented by the second axis.
The image processing apparatus according to claim 1. Using the ICC profile having the color gamut, it further has a conversion unit that converts the designated color information regarding the designated color from the coordinate values in the RGB color space or the CMYK color space to the coordinate values in the L ^* a ^* b ^* color space. ,
The display control unit causes the display device to display the image using the information after conversion by the conversion unit.
The image processing apparatus according to any one of claims 1 to 4. The display control unit changes the background color of the image based on the instruction.
The image processing apparatus according to any one of claims 1 to 5. The display control unit switches whether or not to display the figure in the wire frame model based on the instruction.
The image processing apparatus according to any one of claims 1 to 6. The display control unit switches whether or not to display the figure on the surface model based on the instruction.
The image processing apparatus according to any one of claims 1 to 7. The display control unit changes the color of the figure based on the instruction.
The image processing apparatus according to any one of claims 1 to 8. Based on the instruction, the display control unit highlights the dot selected by the user as compared with the case where the dot is not selected.
The image processing apparatus according to any one of claims 1 to 9. The display control unit enlarges or reduces the figure based on the instruction.
The image processing apparatus according to any one of claims 1 to 10. The color space is an L ^* a ^* b ^* color space.
The image processing apparatus according to any one of claims 1 to 11. A display device displays an image showing a figure representing a color gamut, a dot representing a specified color, and one or more axes representing a feature amount of a color in the same three-dimensional color space as viewed from a predetermined viewpoint. That and
Accepting instructions from users and
Including changing the image with the change of the viewpoint based on the instruction.
Image processing method. A display device displays an image showing a figure representing a color gamut, a dot representing a specified color, and one or more axes representing a feature amount of a color in the same three-dimensional color space as viewed from a predetermined viewpoint. That and
Accepting instructions from users and
Based on the instruction, the computer is made to change the image according to the change of the viewpoint.
Image processing program.

Images